Electric motor.



.J. D. FORRER.

ELECTRIC MOTOR.

APPLICATION FILED JAN.10.1908.

Patented J an. 2, 1912.

ATTORNEY WITNESSES:

' ball bearings. for the rotatable members U N ITED' STATES PATENT OFFICE,

JOSEPH D. FORRER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, OF EAST PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

' ELECTRIC MOTOR.

To all whom it may concern:

Be it known'that I, JOSEPH D. FoRRER, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful 'Improvement in Electric Motors, of which the following is a specifi-- cation. v

My invention relates to electric motors and similar devices that are provided with thereof.

Theobject of my invention is to provide such a structure and arrangement of the parts of a device of the character aboveindicated that ready dismantling and reassembling thereof may not be interferedWith by the bearings. I

Electric motors that are employed for the propulsion of "automobiles and for other purposes are frequently provided with ballbearings for the armatures, a common construction for such bearings comprising two concentric sleeves with balls interposed between the same and occupying grooved races therein. may operate to the best advantage and be subject to the-minimum of wear, it has been found quite essential tosec'urely fix the inner sleeve to the armature shaft. As the motors have heretofore been constructed, however, fixing of the bearings to the shaft has rendered it extremely. difficult and inconvenient to remove the armature from the remainder of the motor because of the difliculty of detaching the bearings from the shaft.

The object of the present invention is to obviatethe diflicultiesthat have heretofore resulted from this cause.

The single figure of the accompanying drawing is a view, partially in side elevation and partially in vertical section, of a motor constructed inaccordance with my invention.

An armature l 'of an electric motor, in connection with which the invention may be conveniently illustrated and described, is mounted upon a shaft or axle 2, and a cylindrical casing 3 having one closed end 4 supports laminated field magnet poles 5 in operative relation to the armature 1, the open end of the casing being provided with a cover or bracket 6 that is detachably secured Specification of Letters Patent.

In order that the said bearings' Patented Jan. 2, 1912.

Application filed J'anugry 10, 1908. Serial No. 410,243.'

- thereto by means of bolts 7. The end 4 of the casing and the bracket 6'are provided with central apertures through which the end of the axle 2 projects; The shaft 2 is provided with bearings at its ends each of which comprises two concentric sleeves 8 and 9 with balls 10 interposed between the same and occupying grooves or races in the opposing circumferential surfaces of the sleeves, the inner sleeves 8 beingpressed upon the shaft or otherwise fixed thereto.

The bearings are located within sockets provided by collars 11 that are detachably secured to the inner faces, respectively, of the end of the casing 3 and of the cover or bracket 6 by means of tap bolts 12 the heads of which are exposed upon the exterior of the casing. The outer sleeves 9 are supported by the cylindrical portions of collars 11 so that the armature is maintained in correct position with respect to field magnet.

In order to remove the armature from the 'casingit is necessary to'remove only the bolts 7 and 12 to permit of detaching the bracket 6 from the remainder of the casing and of detaching the collar 11 from the easing and its cover. The armature may, therefore, be removed for inspect-ion and repair without injuring or in any way disturbing the alinement of the bearings.

I claim as my invention:

1, In an electric motor, the combination with an ax'le,-an armature carried thereby, a casing having an open end and comprisin a field magnet core, and a bracket or cover %OI' the open end of the casing, ofbearings for the axle comprising concentric sleeves and ber carried thereby, and a relatively stationv ary casing for the member having internal recesses its ends, of bearings for the shaft comprising concentric sleeves and interposed balls located in said recesses,'co1lars having bearing sockets also seated in said recesses,

and means for detachably securing said col- 5 hrs in the recesses.

4. The combination with a shaft, a member carried thereby, and a relatively stationary casing for the member, of bearingscfor the shaft comprising concentric sleeves and 10 interposed balls, collars having sockets for curing said collars t0 the interior'faces of the casing. I

In testimony whereof, I have hereunto subscribed my name this 27th day of Dec., 15

J. D. FORRER. "Witnesses: I

MALCOLM MAGLAREN, BIRNEY HINES. 

